Microsoft · Security update · February 9, 2021
KB4601366: February 2021 security update
KB4601366, released February 9, 2021, fixes 12 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: Urgent. The product is no longer supported.
Urgent1 publicly disclosedUnsupported product
CVEs closed
12
6 rated Critical
Exploited
0
None reported
Exploitation more likely
5
Microsoft's assessment
Highest EPSS
0.5896
99th percentile
Priority of the 12 CVEs
Patch now 0
Urgent 8
High 3
Routine 1
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Urgent | CVE-2021-24086 | Windows TCP/IP | Denial of Service | 7.5 | 0.5896 | More likely |
| Urgent | CVE-2021-24074 | Windows TCP/IP | Remote Code Execution | 9.8 | 0.2616 | More likely |
| Urgent | CVE-2021-24094 | Windows TCP/IP | Remote Code Execution | 9.8 | 0.2214 | More likely |
| Urgent | CVE-2021-24078 | Role: DNS Server | Remote Code Execution | 9.8 | 0.1189 | More likely |
| Urgent | CVE-2021-24077 | Role: Windows Fax Service | Remote Code Execution | 9.8 | 0.0287 | Exploitation Less Likely |
| Urgent | CVE-2021-1722 | Role: Windows Fax Service | Remote Code Execution | 8.1 | 0.0244 | Exploitation Less Likely |
| Urgent | CVE-2021-24088 | Windows Print Spooler Components | Remote Code Execution | 8.8 | 0.0243 | Exploitation Less Likely |
| Urgent | CVE-2021-1727 | Windows Installer | Elevation of Privilege | 7.8 | 0.0076 | DisclosedMore likely |
| High | CVE-2021-1734 | Windows Remote Procedure Call | Information Disclosure | 7.5 | 0.0381 | Exploitation Less Likely |
| High | CVE-2021-24103 | Windows Event Tracing | Elevation of Privilege | 7.8 | 0.0063 | Exploitation Less Likely |
| High | CVE-2021-24102 | Windows Event Tracing | Elevation of Privilege | 7.8 | 0.0055 | Exploitation Less Likely |
| Routine | CVE-2021-24080 | Windows Trust Verification API | Denial of Service | 6.5 | 0.0305 | Exploitation Less Likely |
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